package com.itheima.consumer.controller;


import com.itheima.consumer.domain.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * 服务的调用方
 */

@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("/goods/{id}")
    public Goods findGoodsById(@PathVariable("id") int id){

//        List<ServiceInstance> instances = discoveryClient.getInstances("EUREKA-PROVIDER");
//        //判断集合是否有数据
//        if(instances == null || instances.size() == 0){
//            //集合没有数据
//            return null;
//        }
//        ServiceInstance instance = instances.get(0);
//        String host = instance.getHost();
//        int port = instance.getPort();
//        System.out.println(host);
//        System.out.println(port);
//        String url = "http://"+host+":"+port+"/goods/findOne/"+id;

        /**
         *由于使用了负载均衡,所以ip和端口由Ribbon负责,我们需要替换成提供者application.yml中的spring.application.name的值
         * EUREKA-PROVIDERE是提供者在application中的 spring.application.name的值
         */
        String url = "http://EUREKA-PROVIDERE/goods/findOne/"+id;
        // 3. 调用方法
        Goods goods = restTemplate.getForObject(url, Goods.class);

        return goods;
    }


}
